I.S. EN 331:2015现行
Manually Operated Ball Valves and Closed Bottom Taper Plug Valves for gas Installations for Buildings
出版：National Standards Authority of Ireland
专家解读视频
Gives the characteristics for the construction, performance and safety of ball valves and closed bottom taper plug valves.
NEN EN 331:2015 - Identical
NF EN 331:2016 - Identical
NBN EN 331:2016 - Identical
EN 331:2015 - Identical
NS EN 331:2015 - Identical
UNE EN 331:2016 - Identical
ONORM EN 331:2016 - Identical
SN EN 331:2016 - Identical
